Schneider Electric 3S1F Industrial Control Transformer

Schneider Electric’s Square D 3S1F is a dry-type, encapsulated single‑phase control transformer rated at 3 kVA, engineered to provide clean, isolated 120/240 V control power from 240/480 V mains in electrical control panels. It features dual primary voltages (240 V and 480 V) and dual secondary voltages (120 V and 240 V), enabling flexible integration with common industrial control circuits, relays, and instrumentation. The unit is designed for reliable panel mounting with an enclosure and windings optimized for steady operation, and it carries a 115°C rise rating to handle typical panel‑level loads. The 3S1F model is TAA (Trade Agreements Act) compliant, making it suitable for government and other procurement environments. Intended uses include powering control circuits within machine control panels, relay and timer assemblies, PLC input power, and other control‑logic applications where isolation between the high‑voltage supply and low‑voltage control circuitry is required. This encapsulated, dry‑type transformer delivers the necessary voltage conversion in a compact form factor, helping to simplify wiring and reduce panel space while maintaining reliable, stable control power for industrial equipment.